ConTeXtgarden had theanswer when I searched again:

\setupbodyfont[dejavu]
\mainlanguage[russian]

G


> On 3 May 2020, at 13:34, Gerben Wierda <gerben.wierda@rna.nl> wrote:
> 
> I am looking for a way to amend a typescript for the additional use of cyrillic characters.
> 
> I currently use:
> 
>  \starttypescript [sans] [optima]
>    \setups[font:fallback:sans]
>    \definefontsynonym [Sans]           [file:Optima.ttc(Optima Regular)]     [features=default]
>    \definefontsynonym [SansBold]       [file:Optima.ttc(Optima Bold)]        [features=default]
>    \definefontsynonym [SansItalic]     [file:Optima.ttc(Optima Italic)]      [features=default]
>    \definefontsynonym [SansBoldItalic] [file:Optima.ttc(Optima Bold Italic)] [features=default]
> \stoptypescript
> 
> \definetypeface [optima] [ss] [sans] [optima] [default]
> \definetypeface [optima] [rm] [serif] [optima] [default]
> \definetypeface [optima] [tt] [mono] [modern] [default]
> \definetypeface [optima] [mm] [math] [pagella] [default]
> 
> \setupbodyfont [optima]
> 
> But Optima doesn’t have cyrillic characters. So, either I have te  use another typescript. I tried creating a Helvetica (as Helvetica.ttc on macOS seems to have cyrillic characters) but did not succeed.
> 
> 
> I also tried
> 
> \language[ru]
> 
> without any \setupbodyfont hoping it would also fix the font issue but keep getting
> 
> fonts           > checking > char –® (U+00428) in font 'LMRoman10-Regular' with id 8: missing
> 
> I read the languages-mkiv document but it did not say what I had to do about fonts.
> 
> What do I have to do to get both English and Russian in my document in terms of fonts?
> 
> G
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